I came from a 8330 to the 9550 (Storm 2) overall I'm happy, definitely a cool device. The one thing I find aggravating is the lack of apps that work over WiFi on the Storm2.
It seems that any time I find one (WiFi Transfer, VLC Remote, etc) they currently don't support the Storm2... I'm sure this will change over time but right now being able to "surf faster" isn't enough for me to have the WiFi on. My cell signal is strong enough that it's just about as fast as WiFi for anything I do.